A quadrilateral is any shape with four sides; angles can be acute or obtuse. A perfect square is the only quadrilateral with only right angles.
No, if it has right angles it is a special case, such as rectangle, but in general it does not have to have any right angles
A Rectangle or a square. The word 'rectangle' comes from Latin and means 'Right(Recto) Angles'.
-- Every quadrilateral has four sides.-- If it has no right angles, then it could be a parallelogram, a rhombus,a kite, a trapezoid, or any non-regular quadrilateral.
4 because the 4 interior angles of any quadrilateral add up to 360 degrees
Can be a Parallelogram, a Rhombus, A Kite, or a Trapezium. However, A kite may display one right angle, depending on its angular measure. An Asymmetric Trapezium may also display two adjacent right angles. A Symmetric Trapezium does NOT have any right angles. NB A Square has four right angles. A RECTANGLE has four right angles. The word 'Rectangle' is from its Latin base , meaning 'Right(rect) Angles).
It is a convex quadrilateral, as the remaining angles could be any two angles with a sum of 180 degrees.
It is a rhombus that has 4 equal sides but no right angles.
Any quadrilateral in which at least one (and therefore at least two) angles are not right angles is not a rectangle. The majority of these do not have a specific name.
If it is a quadrilateral it cannot be "not a quadrilateral"!
a rectangle is any quadrilateral with four right angles
Any kite or square.